Reactions gives you new ways to express love, awe, humor and sadness.
Youll be able to express these reactions by long pressing or hovering over the Like button.
The users will be able to see the traditional thumbs-up Like below posts.
The buttons will be animated to convey their meaning in a better way.
For example, the angry button will grow red in rage.
This means Facebook can deliver more targeted ads to users based on their reactions to different posts.
source: www.techworm.net
